Cannot browse all products when creating transactions

[baratgabor]

The typeahead search on transaction creation modal was hastily implemented, and it only shows a certain number of products, without ability to display a scrollable list. If too many products match a given search keyword, only the first X will be selectable.

Instead of hard-limiting the number of products to a low number, implement a scrolling result list and show significantly more products.

Optionally also implement an alternative product selector that lists all products without searching.